RDMA/nes: Add a driver for NetEffect RNICs

Add a standard NIC and RDMA/iWARP driver for NetEffect 1/10Gb ethernet adapters.

Signed-off-by: Glenn Streiff <gstreiff@neteffect.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 1152 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/nes/nes.c b/drivers/infiniband/hw/nes/nes.c
new file mode 100644
index 000000000000..7f8853b44ee1
--- /dev/null
+++ b/drivers/infiniband/hw/nes/nes.c
@@ -0,0 +1,1152 @@
+/*
+ * Copyright (c) 2006 - 2008 NetEffect, Inc. All rights reserved.
+ * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/mii.h>
+#include <linux/if_vlan.h>
+#include <linux/crc32.h>
+#include <linux/in.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/if_arp.h>
+#include <linux/highmem.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/byteorder.h>
+#include <rdma/ib_smi.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_pack.h>
+#include <rdma/iw_cm.h>
+
+#include "nes.h"
+
+#include <net/netevent.h>
+#include <net/neighbour.h>
+#include <linux/route.h>
+#include <net/ip_fib.h>
+
+MODULE_AUTHOR("NetEffect");
+MODULE_DESCRIPTION("NetEffect RNIC Low-level iWARP Driver");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(DRV_VERSION);
+
+int max_mtu = 9000;
+int nics_per_function = 1;
+int interrupt_mod_interval = 0;
+
+
+/* Interoperability */
+int mpa_version = 1;
+module_param(mpa_version, int, 0);
+MODULE_PARM_DESC(mpa_version, "MPA version to be used int MPA Req/Resp (0 or 1)");
+
+/* Interoperability */
+int disable_mpa_crc = 0;
+module_param(disable_mpa_crc, int, 0);
+MODULE_PARM_DESC(disable_mpa_crc, "Disable checking of MPA CRC");
+
+unsigned int send_first = 0;
+module_param(send_first, int, 0);
+MODULE_PARM_DESC(send_first, "Send RDMA Message First on Active Connection");
+
+
+unsigned int nes_drv_opt = 0;
+module_param(nes_drv_opt, int, 0);
+MODULE_PARM_DESC(nes_drv_opt, "Driver option parameters");
+
+unsigned int nes_debug_level = 0;
+module_param_named(debug_level, nes_debug_level, uint, 0644);
+MODULE_PARM_DESC(debug_level, "Enable debug output level");
+
+LIST_HEAD(nes_adapter_list);
+LIST_HEAD(nes_dev_list);
+
+atomic_t qps_destroyed;
+atomic_t cqp_reqs_allocated;
+atomic_t cqp_reqs_freed;
+atomic_t cqp_reqs_dynallocated;
+atomic_t cqp_reqs_dynfreed;
+atomic_t cqp_reqs_queued;
+atomic_t cqp_reqs_redriven;
+
+static void nes_print_macaddr(struct net_device *netdev);
+static irqreturn_t nes_interrupt(int, void *);
+static int __devinit nes_probe(struct pci_dev *, const struct pci_device_id *);
+static void __devexit nes_remove(struct pci_dev *);
+static int __init nes_init_module(void);
+static void __exit nes_exit_module(void);
+static unsigned int ee_flsh_adapter;
+static unsigned int sysfs_nonidx_addr;
+static unsigned int sysfs_idx_addr;
+
+static struct pci_device_id nes_pci_table[] = {
+        {PCI_VENDOR_ID_NETEFFECT, PCI_DEVICE_ID_NETEFFECT_NE020, PCI_ANY_ID, PCI_ANY_ID},
+        {0}
+};
+
+MODULE_DEVICE_TABLE(pci, nes_pci_table);
+
+static int nes_inetaddr_event(struct notifier_block *, unsigned long, void *);
+static int nes_net_event(struct notifier_block *, unsigned long, void *);
+static int nes_notifiers_registered;
+
+
+static struct notifier_block nes_inetaddr_notifier = {
+        .notifier_call = nes_inetaddr_event
+};
+
+static struct notifier_block nes_net_notifier = {
+        .notifier_call = nes_net_event
+};
+
+
+
+
+/**
+ * nes_inetaddr_event
+ */
+static int nes_inetaddr_event(struct notifier_block *notifier,
+                unsigned long event, void *ptr)
+{
+        struct in_ifaddr *ifa = ptr;
+        struct net_device *event_netdev = ifa->ifa_dev->dev;
+        struct nes_device *nesdev;
+        struct net_device *netdev;
+        struct nes_vnic *nesvnic;
+        unsigned int addr;
+        unsigned int mask;
+
+        addr = ntohl(ifa->ifa_address);
+        mask = ntohl(ifa->ifa_mask);
+        nes_debug(NES_DBG_NETDEV, "nes_inetaddr_event: ip address %08X, netmask %08X.\n",
+                        addr, mask);
+        list_for_each_entry(nesdev, &nes_dev_list, list) {
+                nes_debug(NES_DBG_NETDEV, "Nesdev list entry = 0x%p. (%s)\n",
+                                nesdev, nesdev->netdev[0]->name);
+                netdev = nesdev->netdev[0];
+                nesvnic = netdev_priv(netdev);
+                if (netdev == event_netdev) {
+                        if (nesvnic->rdma_enabled == 0) {
+                                nes_debug(NES_DBG_NETDEV, "Returning without processing event for %s since"
+                                                " RDMA is not enabled.\n",
+                                                netdev->name);
+                                return NOTIFY_OK;
+                        }
+                        /* we have ifa->ifa_address/mask here if we need it */
+                        switch (event) {
+                                case NETDEV_DOWN:
+                                        nes_debug(NES_DBG_NETDEV, "event:DOWN\n");
+                                        nes_write_indexed(nesdev,
+                                                        NES_IDX_DST_IP_ADDR+(0x10*PCI_FUNC(nesdev->pcidev->devfn)), 0);
+
+                                        nes_manage_arp_cache(netdev, netdev->dev_addr,
+                                                        ntohl(nesvnic->local_ipaddr), NES_ARP_DELETE);
+                                        nesvnic->local_ipaddr = 0;
+                                        return NOTIFY_OK;
+                                        break;
+                                case NETDEV_UP:
+                                        nes_debug(NES_DBG_NETDEV, "event:UP\n");
+
+                                        if (nesvnic->local_ipaddr != 0) {
+                                                nes_debug(NES_DBG_NETDEV, "Interface already has local_ipaddr\n");
+                                                return NOTIFY_OK;
+                                        }
+                                        /* Add the address to the IP table */
+                                        nesvnic->local_ipaddr = ifa->ifa_address;
+
+                                        nes_write_indexed(nesdev,
+                                                        NES_IDX_DST_IP_ADDR+(0x10*PCI_FUNC(nesdev->pcidev->devfn)),
+                                                        ntohl(ifa->ifa_address));
+                                        nes_manage_arp_cache(netdev, netdev->dev_addr,
+                                                        ntohl(nesvnic->local_ipaddr), NES_ARP_ADD);
+                                        return NOTIFY_OK;
+                                        break;
+                                default:
+                                        break;
+                        }
+                }
+        }
+
+        return NOTIFY_DONE;
+}
+
+
+/**
+ * nes_net_event
+ */
+static int nes_net_event(struct notifier_block *notifier,
+                unsigned long event, void *ptr)
+{
+        struct neighbour *neigh = ptr;
+        struct nes_device *nesdev;
+        struct net_device *netdev;
+        struct nes_vnic *nesvnic;
+
+        switch (event) {
+                case NETEVENT_NEIGH_UPDATE:
+                        list_for_each_entry(nesdev, &nes_dev_list, list) {
+                                /* nes_debug(NES_DBG_NETDEV, "Nesdev list entry = 0x%p.\n", nesdev); */
+                                netdev = nesdev->netdev[0];
+                                nesvnic = netdev_priv(netdev);
+                                if (netdev == neigh->dev) {
+                                        if (nesvnic->rdma_enabled == 0) {
+                                                nes_debug(NES_DBG_NETDEV, "Skipping device %s since no RDMA\n",
+                                                                netdev->name);
+                                        } else {
+                                                if (neigh->nud_state & NUD_VALID) {
+                                                        nes_manage_arp_cache(neigh->dev, neigh->ha,
+                                                                        ntohl(*(__be32 *)neigh->primary_key), NES_ARP_ADD);
+                                                } else {
+                                                        nes_manage_arp_cache(neigh->dev, neigh->ha,
+                                                                        ntohl(*(__be32 *)neigh->primary_key), NES_ARP_DELETE);
+                                                }
+                                        }
+                                        return NOTIFY_OK;
+                                }
+                        }
+                        break;
+                default:
+                        nes_debug(NES_DBG_NETDEV, "NETEVENT_ %lu undefined\n", event);
+                        break;
+        }
+
+        return NOTIFY_DONE;
+}
+
+
+/**
+ * nes_add_ref
+ */
+void nes_add_ref(struct ib_qp *ibqp)
+{
+        struct nes_qp *nesqp;
+
+        nesqp = to_nesqp(ibqp);
+        nes_debug(NES_DBG_QP, "Bumping refcount for QP%u.  Pre-inc value = %u\n",
+                        ibqp->qp_num, atomic_read(&nesqp->refcount));
+        atomic_inc(&nesqp->refcount);
+}
+
+static void nes_cqp_rem_ref_callback(struct nes_device *nesdev, struct nes_cqp_request *cqp_request)
+{
+        unsigned long flags;
+        struct nes_qp *nesqp = cqp_request->cqp_callback_pointer;
+        struct nes_adapter *nesadapter = nesdev->nesadapter;
+        u32 qp_id;
+
+        atomic_inc(&qps_destroyed);
+
+        /* Free the control structures */
+
+        qp_id = nesqp->hwqp.qp_id;
+        if (nesqp->pbl_vbase) {
+                pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
+                                nesqp->hwqp.q2_vbase, nesqp->hwqp.q2_pbase);
+                spin_lock_irqsave(&nesadapter->pbl_lock, flags);
+                nesadapter->free_256pbl++;
+                spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
+                pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase);
+                nesqp->pbl_vbase = NULL;
+
+        } else {
+                pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
+                                nesqp->hwqp.sq_vbase, nesqp->hwqp.sq_pbase);
+        }
+        nes_free_resource(nesadapter, nesadapter->allocated_qps, nesqp->hwqp.qp_id);
+
+        kfree(nesqp->allocated_buffer);
+
+}
+
+/**
+ * nes_rem_ref
+ */
+void nes_rem_ref(struct ib_qp *ibqp)
+{
+        u64 u64temp;
+        struct nes_qp *nesqp;
+        struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
+        struct nes_device *nesdev = nesvnic->nesdev;
+        struct nes_adapter *nesadapter = nesdev->nesadapter;
+        struct nes_hw_cqp_wqe *cqp_wqe;
+        struct nes_cqp_request *cqp_request;
+        u32 opcode;
+
+        nesqp = to_nesqp(ibqp);
+
+        if (atomic_read(&nesqp->refcount) == 0) {
+                printk(KERN_INFO PFX "%s: Reference count already 0 for QP%d, last aeq = 0x%04X.\n",
+                                __FUNCTION__, ibqp->qp_num, nesqp->last_aeq);
+                BUG();
+        }
+
+        if (atomic_dec_and_test(&nesqp->refcount)) {
+                nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = NULL;
+
+                /* Destroy the QP */
+                cqp_request = nes_get_cqp_request(nesdev);
+                if (cqp_request == NULL) {
+                        nes_debug(NES_DBG_QP, "Failed to get a cqp_request.\n");
+                        return;
+                }
+                cqp_request->waiting = 0;
+                cqp_request->callback = 1;
+                cqp_request->cqp_callback = nes_cqp_rem_ref_callback;
+                cqp_request->cqp_callback_pointer = nesqp;
+                cqp_wqe = &cqp_request->cqp_wqe;
+
+                nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
+                opcode = NES_CQP_DESTROY_QP | NES_CQP_QP_TYPE_IWARP;
+
+                if (nesqp->hte_added) {
+                        opcode  |= NES_CQP_QP_DEL_HTE;
+                        nesqp->hte_added = 0;
+                }
+                set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
+                set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
+                u64temp = (u64)nesqp->nesqp_context_pbase;
+                set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
+                nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
+        }
+}
+
+
+/**
+ * nes_get_qp
+ */
+struct ib_qp *nes_get_qp(struct ib_device *device, int qpn)
+{
+        struct nes_vnic *nesvnic = to_nesvnic(device);
+        struct nes_device *nesdev = nesvnic->nesdev;
+        struct nes_adapter *nesadapter = nesdev->nesadapter;
+
+        if ((qpn < NES_FIRST_QPN) || (qpn >= (NES_FIRST_QPN + nesadapter->max_qp)))
+                return NULL;
+
+        return &nesadapter->qp_table[qpn - NES_FIRST_QPN]->ibqp;
+}
+
+
+/**
+ * nes_print_macaddr
+ */
+static void nes_print_macaddr(struct net_device *netdev)
+{
+        nes_debug(NES_DBG_INIT, "%s: MAC %02X:%02X:%02X:%02X:%02X:%02X, IRQ %u\n",
+                        netdev->name,
+                        netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2],
+                        netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5],
+                        netdev->irq);
+}
+
+
+/**
+ * nes_interrupt - handle interrupts
+ */
+static irqreturn_t nes_interrupt(int irq, void *dev_id)
+{
+        struct nes_device *nesdev = (struct nes_device *)dev_id;
+        int handled = 0;
+        u32 int_mask;
+        u32 int_req;
+        u32 int_stat;
+        u32 intf_int_stat;
+        u32 timer_stat;
+
+        if (nesdev->msi_enabled) {
+                /* No need to read the interrupt pending register if msi is enabled */
+                handled = 1;
+        } else {
+                if (unlikely(nesdev->nesadapter->hw_rev == NE020_REV)) {
+                        /* Master interrupt enable provides synchronization for kicking off bottom half
+                          when interrupt sharing is going on */
+                        int_mask = nes_read32(nesdev->regs + NES_INT_MASK);
+                        if (int_mask & 0x80000000) {
+                                /* Check interrupt status to see if this might be ours */
+                                int_stat = nes_read32(nesdev->regs + NES_INT_STAT);
+                                int_req = nesdev->int_req;
+                                if (int_stat&int_req) {
+                                        /* if interesting CEQ or AEQ is pending, claim the interrupt */
+                                        if ((int_stat&int_req) & (~(NES_INT_TIMER|NES_INT_INTF))) {
+                                                handled = 1;
+                                        } else {
+                                                if (((int_stat & int_req) & NES_INT_TIMER) == NES_INT_TIMER) {
+                                                        /* Timer might be running but might be for another function */
+                                                        timer_stat = nes_read32(nesdev->regs + NES_TIMER_STAT);
+                                                        if ((timer_stat & nesdev->timer_int_req) != 0) {
+                                                                handled = 1;
+                                                        }
+                                                }
+                                                if ((((int_stat & int_req) & NES_INT_INTF) == NES_INT_INTF) &&
+                                                                (handled == 0)) {
+                                                        intf_int_stat = nes_read32(nesdev->regs+NES_INTF_INT_STAT);
+                                                        if ((intf_int_stat & nesdev->intf_int_req) != 0) {
+                                                                handled = 1;
+                                                        }
+                                                }
+                                        }
+                                        if (handled) {
+                                                nes_write32(nesdev->regs+NES_INT_MASK, int_mask & (~0x80000000));
+                                                int_mask = nes_read32(nesdev->regs+NES_INT_MASK);
+                                                /* Save off the status to save an additional read */
+                                                nesdev->int_stat = int_stat;
+                                                nesdev->napi_isr_ran = 1;
+                                        }
+                                }
+                        }
+                } else {
+                        handled = nes_read32(nesdev->regs+NES_INT_PENDING);
+                }
+        }
+
+        if (handled) {
+
+                if (nes_napi_isr(nesdev) == 0) {
+                        tasklet_schedule(&nesdev->dpc_tasklet);
+
+                }
+                return IRQ_HANDLED;
+        } else {
+                return IRQ_NONE;
+        }
+}
+
+
+/**
+ * nes_probe - Device initialization
+ */
+static int __devinit nes_probe(struct pci_dev *pcidev, const struct pci_device_id *ent)
+{
+        struct net_device *netdev = NULL;
+        struct nes_device *nesdev = NULL;
+        int ret = 0;
+        struct nes_vnic *nesvnic = NULL;
+        void __iomem *mmio_regs = NULL;
+        u8 hw_rev;
+
+        assert(pcidev != NULL);
+        assert(ent != NULL);
+
+        printk(KERN_INFO PFX "NetEffect RNIC driver v%s loading. (%s)\n",
+                        DRV_VERSION, pci_name(pcidev));
+
+        ret = pci_enable_device(pcidev);
+        if (ret) {
+                printk(KERN_ERR PFX "Unable to enable PCI device. (%s)\n", pci_name(pcidev));
+                goto bail0;
+        }
+
+        nes_debug(NES_DBG_INIT, "BAR0 (@0x%08lX) size = 0x%lX bytes\n",
+                        (long unsigned int)pci_resource_start(pcidev, BAR_0),
+                        (long unsigned int)pci_resource_len(pcidev, BAR_0));
+        nes_debug(NES_DBG_INIT, "BAR1 (@0x%08lX) size = 0x%lX bytes\n",
+                        (long unsigned int)pci_resource_start(pcidev, BAR_1),
+                        (long unsigned int)pci_resource_len(pcidev, BAR_1));
+
+        /* Make sure PCI base addr are MMIO */
+        if (!(pci_resource_flags(pcidev, BAR_0) & IORESOURCE_MEM) ||
+                        !(pci_resource_flags(pcidev, BAR_1) & IORESOURCE_MEM)) {
+                printk(KERN_ERR PFX "PCI regions not an MMIO resource\n");
+                ret = -ENODEV;
+                goto bail1;
+        }
+
+        /* Reserve PCI I/O and memory resources */
+        ret = pci_request_regions(pcidev, DRV_NAME);
+        if (ret) {
+                printk(KERN_ERR PFX "Unable to request regions. (%s)\n", pci_name(pcidev));
+                goto bail1;
+        }
+
+        if ((sizeof(dma_addr_t) > 4)) {
+                ret = pci_set_dma_mask(pcidev, DMA_64BIT_MASK);
+                if (ret < 0) {
+                        printk(KERN_ERR PFX "64b DMA mask configuration failed\n");
+                        goto bail2;
+                }
+                ret = pci_set_consistent_dma_mask(pcidev, DMA_64BIT_MASK);
+                if (ret) {
+                        printk(KERN_ERR PFX "64b DMA consistent mask configuration failed\n");
+                        goto bail2;
+                }
+        } else {
+                ret = pci_set_dma_mask(pcidev, DMA_32BIT_MASK);
+                if (ret < 0) {
+                        printk(KERN_ERR PFX "32b DMA mask configuration failed\n");
+                        goto bail2;
+                }
+                ret = pci_set_consistent_dma_mask(pcidev, DMA_32BIT_MASK);
+                if (ret) {
+                        printk(KERN_ERR PFX "32b DMA consistent mask configuration failed\n");
+                        goto bail2;
+                }
+        }
+
+        pci_set_master(pcidev);
+
+        /* Allocate hardware structure */
+        nesdev = kzalloc(sizeof(struct nes_device), GFP_KERNEL);
+        if (!nesdev) {
+                printk(KERN_ERR PFX "%s: Unable to alloc hardware struct\n", pci_name(pcidev));
+                ret = -ENOMEM;
+                goto bail2;
+        }
+
+        nes_debug(NES_DBG_INIT, "Allocated nes device at %p\n", nesdev);
+        nesdev->pcidev = pcidev;
+        pci_set_drvdata(pcidev, nesdev);
+
+        pci_read_config_byte(pcidev, 0x0008, &hw_rev);
+        nes_debug(NES_DBG_INIT, "hw_rev=%u\n", hw_rev);
+
+        spin_lock_init(&nesdev->indexed_regs_lock);
+
+        /* Remap the PCI registers in adapter BAR0 to kernel VA space */
+        mmio_regs = ioremap_nocache(pci_resource_start(pcidev, BAR_0), sizeof(mmio_regs));
+        if (mmio_regs == NULL) {
+                printk(KERN_ERR PFX "Unable to remap BAR0\n");
+                ret = -EIO;
+                goto bail3;
+        }
+        nesdev->regs = mmio_regs;
+        nesdev->index_reg = 0x50 + (PCI_FUNC(pcidev->devfn)*8) + mmio_regs;
+
+        /* Ensure interrupts are disabled */
+        nes_write32(nesdev->regs+NES_INT_MASK, 0x7fffffff);
+
+        if (nes_drv_opt & NES_DRV_OPT_ENABLE_MSI) {
+                if (!pci_enable_msi(nesdev->pcidev)) {
+                        nesdev->msi_enabled = 1;
+                        nes_debug(NES_DBG_INIT, "MSI is enabled for device %s\n",
+                                        pci_name(pcidev));
+                } else {
+                        nes_debug(NES_DBG_INIT, "MSI is disabled by linux for device %s\n",
+                                        pci_name(pcidev));
+                }
+        } else {
+                nes_debug(NES_DBG_INIT, "MSI not requested due to driver options for device %s\n",
+                                pci_name(pcidev));
+        }
+
+        nesdev->csr_start = pci_resource_start(nesdev->pcidev, BAR_0);
+        nesdev->doorbell_region = pci_resource_start(nesdev->pcidev, BAR_1);
+
+        /* Init the adapter */
+        nesdev->nesadapter = nes_init_adapter(nesdev, hw_rev);
+        nesdev->nesadapter->et_rx_coalesce_usecs_irq = interrupt_mod_interval;
+        if (!nesdev->nesadapter) {
+                printk(KERN_ERR PFX "Unable to initialize adapter.\n");
+                ret = -ENOMEM;
+                goto bail5;
+        }
+
+        /* nesdev->base_doorbell_index =
+                        nesdev->nesadapter->pd_config_base[PCI_FUNC(nesdev->pcidev->devfn)]; */
+        nesdev->base_doorbell_index = 1;
+        nesdev->doorbell_start = nesdev->nesadapter->doorbell_start;
+        nesdev->mac_index = PCI_FUNC(nesdev->pcidev->devfn) % nesdev->nesadapter->port_count;
+
+        tasklet_init(&nesdev->dpc_tasklet, nes_dpc, (unsigned long)nesdev);
+
+        /* bring up the Control QP */
+        if (nes_init_cqp(nesdev)) {
+                ret = -ENODEV;
+                goto bail6;
+        }
+
+        /* Arm the CCQ */
+        nes_write32(nesdev->regs+NES_CQE_ALLOC, NES_CQE_ALLOC_NOTIFY_NEXT |
+                        PCI_FUNC(nesdev->pcidev->devfn));
+        nes_read32(nesdev->regs+NES_CQE_ALLOC);
+
+        /* Enable the interrupts */
+        nesdev->int_req = (0x101 << PCI_FUNC(nesdev->pcidev->devfn)) |
+                        (1 << (PCI_FUNC(nesdev->pcidev->devfn)+16));
+        if (PCI_FUNC(nesdev->pcidev->devfn) < 4) {
+                nesdev->int_req |= (1 << (PCI_FUNC(nesdev->pcidev->devfn)+24));
+        }
+
+        /* TODO: This really should be the first driver to load, not function 0 */
+        if (PCI_FUNC(nesdev->pcidev->devfn) == 0) {
+                /* pick up PCI and critical errors if the first driver to load */
+                nesdev->intf_int_req = NES_INTF_INT_PCIERR | NES_INTF_INT_CRITERR;
+                nesdev->int_req |= NES_INT_INTF;
+        } else {
+                nesdev->intf_int_req = 0;
+        }
+        nesdev->intf_int_req |= (1 << (PCI_FUNC(nesdev->pcidev->devfn)+16));
+        nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS0, 0);
+        nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS1, 0);
+        nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS2, 0x00001265);
+        nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS4, 0x18021804);
+
+        nes_write_indexed(nesdev, NES_IDX_DEBUG_ERROR_MASKS3, 0x17801790);
+
+        /* deal with both periodic and one_shot */
+        nesdev->timer_int_req = 0x101 << PCI_FUNC(nesdev->pcidev->devfn);
+        nesdev->nesadapter->timer_int_req |= nesdev->timer_int_req;
+        nes_debug(NES_DBG_INIT, "setting int_req for function %u, nesdev = 0x%04X, adapter = 0x%04X\n",
+                        PCI_FUNC(nesdev->pcidev->devfn),
+                        nesdev->timer_int_req, nesdev->nesadapter->timer_int_req);
+
+        nes_write32(nesdev->regs+NES_INTF_INT_MASK, ~(nesdev->intf_int_req));
+
+        list_add_tail(&nesdev->list, &nes_dev_list);
+
+        /* Request an interrupt line for the driver */
+        ret = request_irq(pcidev->irq, nes_interrupt, IRQF_SHARED, DRV_NAME, nesdev);
+        if (ret) {
+                printk(KERN_ERR PFX "%s: requested IRQ %u is busy\n",
+                                pci_name(pcidev), pcidev->irq);
+                goto bail65;
+        }
+
+        nes_write32(nesdev->regs+NES_INT_MASK, ~nesdev->int_req);
+
+        if (nes_notifiers_registered == 0) {
+                register_inetaddr_notifier(&nes_inetaddr_notifier);
+                register_netevent_notifier(&nes_net_notifier);
+        }
+        nes_notifiers_registered++;
+
+        /* Initialize network devices */
+                if ((netdev = nes_netdev_init(nesdev, mmio_regs)) == NULL) {
+                        goto bail7;
+                }
+
+                /* Register network device */
+                ret = register_netdev(netdev);
+                if (ret) {
+                        printk(KERN_ERR PFX "Unable to register netdev, ret = %d\n", ret);
+                        nes_netdev_destroy(netdev);
+                        goto bail7;
+                }
+
+                nes_print_macaddr(netdev);
+                /* create a CM core for this netdev */
+                nesvnic = netdev_priv(netdev);
+
+                nesdev->netdev_count++;
+                nesdev->nesadapter->netdev_count++;
+
+
+        printk(KERN_ERR PFX "%s: NetEffect RNIC driver successfully loaded.\n",
+                        pci_name(pcidev));
+        return 0;
+
+        bail7:
+        printk(KERN_ERR PFX "bail7\n");
+        while (nesdev->netdev_count > 0) {
+                nesdev->netdev_count--;
+                nesdev->nesadapter->netdev_count--;
+
+                unregister_netdev(nesdev->netdev[nesdev->netdev_count]);
+                nes_netdev_destroy(nesdev->netdev[nesdev->netdev_count]);
+        }
+
+        nes_debug(NES_DBG_INIT, "netdev_count=%d, nesadapter->netdev_count=%d\n",
+                        nesdev->netdev_count, nesdev->nesadapter->netdev_count);
+
+        nes_notifiers_registered--;
+        if (nes_notifiers_registered == 0) {
+                unregister_netevent_notifier(&nes_net_notifier);
+                unregister_inetaddr_notifier(&nes_inetaddr_notifier);
+        }
+
+        list_del(&nesdev->list);
+        nes_destroy_cqp(nesdev);
+
+        bail65:
+        printk(KERN_ERR PFX "bail65\n");
+        free_irq(pcidev->irq, nesdev);
+        if (nesdev->msi_enabled) {
+                pci_disable_msi(pcidev);
+        }
+        bail6:
+        printk(KERN_ERR PFX "bail6\n");
+        tasklet_kill(&nesdev->dpc_tasklet);
+        /* Deallocate the Adapter Structure */
+        nes_destroy_adapter(nesdev->nesadapter);
+
+        bail5:
+        printk(KERN_ERR PFX "bail5\n");
+        iounmap(nesdev->regs);
+
+        bail3:
+        printk(KERN_ERR PFX "bail3\n");
+        kfree(nesdev);
+
+        bail2:
+        pci_release_regions(pcidev);
+
+        bail1:
+        pci_disable_device(pcidev);
+
+        bail0:
+        return ret;
+}
+
+
+/**
+ * nes_remove - unload from kernel
+ */
+static void __devexit nes_remove(struct pci_dev *pcidev)
+{
+        struct nes_device *nesdev = pci_get_drvdata(pcidev);
+        struct net_device *netdev;
+        int netdev_index = 0;
+
+                if (nesdev->netdev_count) {
+                        netdev = nesdev->netdev[netdev_index];
+                        if (netdev) {
+                                netif_stop_queue(netdev);
+                                unregister_netdev(netdev);
+                                nes_netdev_destroy(netdev);
+
+                                nesdev->netdev[netdev_index] = NULL;
+                                nesdev->netdev_count--;
+                                nesdev->nesadapter->netdev_count--;
+                        }
+                }
+
+        nes_notifiers_registered--;
+        if (nes_notifiers_registered == 0) {
+                unregister_netevent_notifier(&nes_net_notifier);
+                unregister_inetaddr_notifier(&nes_inetaddr_notifier);
+        }
+
+        list_del(&nesdev->list);
+        nes_destroy_cqp(nesdev);
+        tasklet_kill(&nesdev->dpc_tasklet);
+
+        /* Deallocate the Adapter Structure */
+        nes_destroy_adapter(nesdev->nesadapter);
+
+        free_irq(pcidev->irq, nesdev);
+
+        if (nesdev->msi_enabled) {
+                pci_disable_msi(pcidev);
+        }
+
+        iounmap(nesdev->regs);
+        kfree(nesdev);
+
+        /* nes_debug(NES_DBG_SHUTDOWN, "calling pci_release_regions.\n"); */
+        pci_release_regions(pcidev);
+        pci_disable_device(pcidev);
+        pci_set_drvdata(pcidev, NULL);
+}
+
+
+static struct pci_driver nes_pci_driver = {
+        .name = DRV_NAME,
+        .id_table = nes_pci_table,
+        .probe = nes_probe,
+        .remove = __devexit_p(nes_remove),
+};
+
+static ssize_t nes_show_adapter(struct device_driver *ddp, char *buf)
+{
+        unsigned int  devfn = 0xffffffff;
+        unsigned char bus_number = 0xff;
+        unsigned int  i = 0;
+        struct nes_device *nesdev;
+
+        list_for_each_entry(nesdev, &nes_dev_list, list) {
+                if (i == ee_flsh_adapter) {
+                        devfn      = nesdev->nesadapter->devfn;
+                        bus_number = nesdev->nesadapter->bus_number;
+                        break;
+                }
+                i++;
+        }
+
+        return snprintf(buf, PAGE_SIZE, "%x:%x", bus_number, devfn);
+}
+
+static ssize_t nes_store_adapter(struct device_driver *ddp,
+        const char *buf, size_t count)
+{
+        char *p = (char *)buf;
+
+        ee_flsh_adapter = simple_strtoul(p, &p, 10);
+        return strnlen(buf, count);
+}
+
+static ssize_t nes_show_ee_cmd(struct device_driver *ddp, char *buf)
+{
+        u32 eeprom_cmd = 0xdead;
+        u32 i = 0;
+        struct nes_device *nesdev;
+
+        list_for_each_entry(nesdev, &nes_dev_list, list) {
+                if (i == ee_flsh_adapter) {
+                        eeprom_cmd = nes_read32(nesdev->regs + NES_EEPROM_COMMAND);
+                        break;
+                }
+                i++;
+        }
+        return snprintf(buf, PAGE_SIZE, "0x%x\n", eeprom_cmd);
+}
+
+static ssize_t nes_store_ee_cmd(struct device_driver *ddp,
+        const char *buf, size_t count)
+{
+        char *p = (char *)buf;
+        u32 val;
+        u32 i = 0;
+        struct nes_device *nesdev;
+
+        if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
+                val = simple_strtoul(p, &p, 16);
+                list_for_each_entry(nesdev, &nes_dev_list, list) {
+                        if (i == ee_flsh_adapter) {
+                                nes_write32(nesdev->regs + NES_EEPROM_COMMAND, val);
+                                break;
+                        }
+                        i++;
+                }
+        }
+        return strnlen(buf, count);
+}
+
+static ssize_t nes_show_ee_data(struct device_driver *ddp, char *buf)
+{
+        u32 eeprom_data = 0xdead;
+        u32 i = 0;
+        struct nes_device *nesdev;
+
+        list_for_each_entry(nesdev, &nes_dev_list, list) {
+                if (i == ee_flsh_adapter) {
+                        eeprom_data = nes_read32(nesdev->regs + NES_EEPROM_DATA);
+                        break;
+                }
+                i++;
+        }
+
+        return  snprintf(buf, PAGE_SIZE, "0x%x\n", eeprom_data);
+}
+
+static ssize_t nes_store_ee_data(struct device_driver *ddp,
+        const char *buf, size_t count)
+{
+        char *p = (char *)buf;
+        u32 val;
+        u32 i = 0;
+        struct nes_device *nesdev;
+
+        if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
+                val = simple_strtoul(p, &p, 16);
+                list_for_each_entry(nesdev, &nes_dev_list, list) {
+                        if (i == ee_flsh_adapter) {
+                                nes_write32(nesdev->regs + NES_EEPROM_DATA, val);
+                                break;
+                        }
+                        i++;
+                }
+        }
+        return strnlen(buf, count);
+}
+
+static ssize_t nes_show_flash_cmd(struct device_driver *ddp, char *buf)
+{
+        u32 flash_cmd = 0xdead;
+        u32 i = 0;
+        struct nes_device *nesdev;
+
+        list_for_each_entry(nesdev, &nes_dev_list, list) {
+                if (i == ee_flsh_adapter) {
+                        flash_cmd = nes_read32(nesdev->regs + NES_FLASH_COMMAND);
+                        break;
+                }
+                i++;
+        }
+
+        return  snprintf(buf, PAGE_SIZE, "0x%x\n", flash_cmd);
+}
+
+static ssize_t nes_store_flash_cmd(struct device_driver *ddp,
+        const char *buf, size_t count)
+{
+        char *p = (char *)buf;
+        u32 val;
+        u32 i = 0;
+        struct nes_device *nesdev;
+
+        if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
+                val = simple_strtoul(p, &p, 16);
+                list_for_each_entry(nesdev, &nes_dev_list, list) {
+                        if (i == ee_flsh_adapter) {
+                                nes_write32(nesdev->regs + NES_FLASH_COMMAND, val);
+                                break;
+                        }
+                        i++;
+                }
+        }
+        return strnlen(buf, count);
+}
+
+static ssize_t nes_show_flash_data(struct device_driver *ddp, char *buf)
+{
+        u32 flash_data = 0xdead;
+        u32 i = 0;
+        struct nes_device *nesdev;
+
+        list_for_each_entry(nesdev, &nes_dev_list, list) {
+                if (i == ee_flsh_adapter) {
+                        flash_data = nes_read32(nesdev->regs + NES_FLASH_DATA);
+                        break;
+                }
+                i++;
+        }
+
+        return  snprintf(buf, PAGE_SIZE, "0x%x\n", flash_data);
+}
+
+static ssize_t nes_store_flash_data(struct device_driver *ddp,
+        const char *buf, size_t count)
+{
+        char *p = (char *)buf;
+        u32 val;
+        u32 i = 0;
+        struct nes_device *nesdev;
+
+        if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
+                val = simple_strtoul(p, &p, 16);
+                list_for_each_entry(nesdev, &nes_dev_list, list) {
+                        if (i == ee_flsh_adapter) {
+                                nes_write32(nesdev->regs + NES_FLASH_DATA, val);
+                                break;
+                        }
+                        i++;
+                }
+        }
+        return strnlen(buf, count);
+}
+
+static ssize_t nes_show_nonidx_addr(struct device_driver *ddp, char *buf)
+{
+        return  snprintf(buf, PAGE_SIZE, "0x%x\n", sysfs_nonidx_addr);
+}
+
+static ssize_t nes_store_nonidx_addr(struct device_driver *ddp,
+        const char *buf, size_t count)
+{
+        char *p = (char *)buf;
+
+        if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X')
+                sysfs_nonidx_addr = simple_strtoul(p, &p, 16);
+
+        return strnlen(buf, count);
+}
+
+static ssize_t nes_show_nonidx_data(struct device_driver *ddp, char *buf)
+{
+        u32 nonidx_data = 0xdead;
+        u32 i = 0;
+        struct nes_device *nesdev;
+
+        list_for_each_entry(nesdev, &nes_dev_list, list) {
+                if (i == ee_flsh_adapter) {
+                        nonidx_data = nes_read32(nesdev->regs + sysfs_nonidx_addr);
+                        break;
+                }
+                i++;
+        }
+
+        return  snprintf(buf, PAGE_SIZE, "0x%x\n", nonidx_data);
+}
+
+static ssize_t nes_store_nonidx_data(struct device_driver *ddp,
+        const char *buf, size_t count)
+{
+        char *p = (char *)buf;
+        u32 val;
+        u32 i = 0;
+        struct nes_device *nesdev;
+
+        if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
+                val = simple_strtoul(p, &p, 16);
+                list_for_each_entry(nesdev, &nes_dev_list, list) {
+                        if (i == ee_flsh_adapter) {
+                                nes_write32(nesdev->regs + sysfs_nonidx_addr, val);
+                                break;
+                        }
+                        i++;
+                }
+        }
+        return strnlen(buf, count);
+}
+
+static ssize_t nes_show_idx_addr(struct device_driver *ddp, char *buf)
+{
+        return  snprintf(buf, PAGE_SIZE, "0x%x\n", sysfs_idx_addr);
+}
+
+static ssize_t nes_store_idx_addr(struct device_driver *ddp,
+        const char *buf, size_t count)
+{
+        char *p = (char *)buf;
+
+        if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X')
+                sysfs_idx_addr = simple_strtoul(p, &p, 16);
+
+        return strnlen(buf, count);
+}
+
+static ssize_t nes_show_idx_data(struct device_driver *ddp, char *buf)
+{
+        u32 idx_data = 0xdead;
+        u32 i = 0;
+        struct nes_device *nesdev;
+
+        list_for_each_entry(nesdev, &nes_dev_list, list) {
+                if (i == ee_flsh_adapter) {
+                        idx_data = nes_read_indexed(nesdev, sysfs_idx_addr);
+                        break;
+                }
+                i++;
+        }
+
+        return  snprintf(buf, PAGE_SIZE, "0x%x\n", idx_data);
+}
+
+static ssize_t nes_store_idx_data(struct device_driver *ddp,
+        const char *buf, size_t count)
+{
+        char *p = (char *)buf;
+        u32 val;
+        u32 i = 0;
+        struct nes_device *nesdev;
+
+        if (p[1] == 'x' || p[1] == 'X' || p[0] == 'x' || p[0] == 'X') {
+                val = simple_strtoul(p, &p, 16);
+                list_for_each_entry(nesdev, &nes_dev_list, list) {
+                        if (i == ee_flsh_adapter) {
+                                nes_write_indexed(nesdev, sysfs_idx_addr, val);
+                                break;
+                        }
+                        i++;
+                }
+        }
+        return strnlen(buf, count);
+}
+
+static DRIVER_ATTR(adapter, S_IRUSR | S_IWUSR,
+                   nes_show_adapter, nes_store_adapter);
+static DRIVER_ATTR(eeprom_cmd, S_IRUSR | S_IWUSR,
+                   nes_show_ee_cmd, nes_store_ee_cmd);
+static DRIVER_ATTR(eeprom_data, S_IRUSR | S_IWUSR,
+                   nes_show_ee_data, nes_store_ee_data);
+static DRIVER_ATTR(flash_cmd, S_IRUSR | S_IWUSR,
+                   nes_show_flash_cmd, nes_store_flash_cmd);
+static DRIVER_ATTR(flash_data, S_IRUSR | S_IWUSR,
+                   nes_show_flash_data, nes_store_flash_data);
+static DRIVER_ATTR(nonidx_addr, S_IRUSR | S_IWUSR,
+                   nes_show_nonidx_addr, nes_store_nonidx_addr);
+static DRIVER_ATTR(nonidx_data, S_IRUSR | S_IWUSR,
+                   nes_show_nonidx_data, nes_store_nonidx_data);
+static DRIVER_ATTR(idx_addr, S_IRUSR | S_IWUSR,
+                   nes_show_idx_addr, nes_store_idx_addr);
+static DRIVER_ATTR(idx_data, S_IRUSR | S_IWUSR,
+                   nes_show_idx_data, nes_store_idx_data);
+
+static int nes_create_driver_sysfs(struct pci_driver *drv)
+{
+        int error;
+        error  = driver_create_file(&drv->driver, &driver_attr_adapter);
+        error |= driver_create_file(&drv->driver, &driver_attr_eeprom_cmd);
+        error |= driver_create_file(&drv->driver, &driver_attr_eeprom_data);
+        error |= driver_create_file(&drv->driver, &driver_attr_flash_cmd);
+        error |= driver_create_file(&drv->driver, &driver_attr_flash_data);
+        error |= driver_create_file(&drv->driver, &driver_attr_nonidx_addr);
+        error |= driver_create_file(&drv->driver, &driver_attr_nonidx_data);
+        error |= driver_create_file(&drv->driver, &driver_attr_idx_addr);
+        error |= driver_create_file(&drv->driver, &driver_attr_idx_data);
+        return error;
+}
+
+static void nes_remove_driver_sysfs(struct pci_driver *drv)
+{
+        driver_remove_file(&drv->driver, &driver_attr_adapter);
+        driver_remove_file(&drv->driver, &driver_attr_eeprom_cmd);
+        driver_remove_file(&drv->driver, &driver_attr_eeprom_data);
+        driver_remove_file(&drv->driver, &driver_attr_flash_cmd);
+        driver_remove_file(&drv->driver, &driver_attr_flash_data);
+        driver_remove_file(&drv->driver, &driver_attr_nonidx_addr);
+        driver_remove_file(&drv->driver, &driver_attr_nonidx_data);
+        driver_remove_file(&drv->driver, &driver_attr_idx_addr);
+        driver_remove_file(&drv->driver, &driver_attr_idx_data);
+}
+
+/**
+ * nes_init_module - module initialization entry point
+ */
+static int __init nes_init_module(void)
+{
+        int retval;
+        int retval1;
+
+        retval = nes_cm_start();
+        if (retval) {
+                printk(KERN_ERR PFX "Unable to start NetEffect iWARP CM.\n");
+                return retval;
+        }
+        retval = pci_register_driver(&nes_pci_driver);
+        if (retval >= 0) {
+                retval1 = nes_create_driver_sysfs(&nes_pci_driver);
+                if (retval1 < 0)
+                        printk(KERN_ERR PFX "Unable to create NetEffect sys files.\n");
+        }
+        return retval;
+}
+
+
+/**
+ * nes_exit_module - module unload entry point
+ */
+static void __exit nes_exit_module(void)
+{
+        nes_cm_stop();
+        nes_remove_driver_sysfs(&nes_pci_driver);
+
+        pci_unregister_driver(&nes_pci_driver);
+}
+
+
+module_init(nes_init_module);
+module_exit(nes_exit_module);